[TowerTalk] Detuning booms?

[K7LXC at aol.com]

In a message dated 10/19/2008 6:34:20 A.M. Pacific Daylight Time,  
towertalk-request at contesting.com writes:

>  I have 2 yagi's, a C31XR and a 3el 40M (old KLM) I  just
refurbished and put up underneath it. As long as the two
booms are  lined up. All is fine. (At least that makes it simple :>)
If they start  pointing in different directions, the
20M SWR starts rising.
 
    The old KLM 40's were the ones that people would  put 90 degrees out from 
the other antenna because of the interaction. If they  were on the same mast, 
it'd be easier to set-and-forget. Methinks you'll have  to constantly 
re-align both antennas when you're operating to minimize the  interaction in your 
current configuration.
 
    The boom length might not be the problem but the  element lengths. That's 
why Force 12 has an N-version with non-resonant  elements. 
 
Cheers,
Steve    K7LXC
TOWER TECH



 
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